Smith, Chad L., Gregory Hooks, and Michael Lengefeld. “Treadmills of Production and Destruction in the Anthropocene: Coca Production and Gold Mining in Colombia and Peru”. Journal of World-Systems Research 26, no. 2 (August 20, 2020): 231–262. Accessed March 29, 2024. http://jwsr.pitt.edu/ojs/jwsr/article/view/981.